Eco-friendly Bristol 'poo bus' powered by human waste

Britain's first bus to be powered by human and food waste has taken to the roads.

The 40-seat Bio-Bus, nicknamed "the number two," will transport people between Bath and Bristol Airport.

The biomethane gas it runs on is produced at a sewage treatment works at Avonmouth.

The eco-friendly vehicle can travel up to 300km (186 miles) on one tank of gas, which takes the annual waste of about five people to produce.

Dave Harvey reports.